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The relationship between the shear viscosity at 1 s−1 of the 10% (w/w) regenerated SF formic acid solutions/the β-sheet proportion (%) of the SF films and mechanical properties of the regenerated SF films produced from different silkworm strains; (A,B) maximum stress, (C,D) elongation at break, and (E,F) the work of rupture of the regenerated SF films.
